Cooling means for explosive-engine cylinders.



PATENTED JAN. 23, 1906.

S1. HAM. COOLING MEANS FOR EXPLOSIVE ENGINE CYLINDERS A-BBLIOATLONI'ILED MAY 8, 190 5.

INVENTOR W a' mm? ATTORNEY UNITED STATES PATENT QFFICE.

AUGUST H. TIMMERMAN, OF INDIANAPOLIS, INDIANA.

.Y COCLING MEANS FOR EXPLOSIVE-ENGIN E CYLINDERS.

Specification of Letters Patent.

Patented Jan. 23, 1906.

Application filed May 8, 1905. Serial No. 259.363.

To all whom may; concern.-

Be it known that I, Srnnon HAM, a citizen of the United States, residingat Indianapolis, in the county of Marion and State of Indiana, haveinvented certain new and useful Improvements in Cooling Means forExplosive-Engine Cylinders, of which the following is a specification,reierence being had therein to the accompanying drawings.

My invention relates to a means for cooling the cylinders oi gas orexplosive engines; and it consistsin means hereinafter described, andparticularly pointed out in the claim. 4

The object of this invention is to provide a means whereby a continuousjet or column of cooling-air will be continuously forced at a highvelocity along the space between the air-jacket and the exterior heatedsurface of the cylinder of the explosive-engine and in passing willbecaused to impinge in a measure or degree against the cooling-ribssituated around the exterior of that portion of the cylinder subjectedto heat to prevent an undue heating of said cylinder; also to constructsaid air jet or column producing means of an annular form to surroundthe cylinder and situate said means at the open-bottom or bell-mouth endof the air-jacket of the cylinder, so that the action of the column ofair flowing from'the annular jet-tube will blow into the open-bottomflared or bell-mouthed end of said jacket to operate as a siphon, andthereby create a strong vacuum to draw the exterior cold air into thespace between the air-jacket and the cylinder and to rapidly force itupwardly in such space to construct said air-jacket at its top open endwith an annular deflectingcurve, so that the escaping air will bedeflecteddownwardly to impinge the cylinder. 4 the cylinder,

against the to end or cover of the cylinder torapidly cooi the same. Iattain these objects by the means illustrated in the accompanyingdrawings, in which similar numerals of reference designate like partsthroughout the several views. i

Figure 1 is a partly-broken sectional elevation of a gas-engine, showingmy invention of an air-cooling means applied thereto. Fig. 2 is asectional plan view of the same. Fig. 3 is an enlarged detail sectionalview of one of the air-casing-securing bolts, showin the manner ofsecuring the air casing or j aol r Fig. 4 is a broken portion of showingone of the tapped ing of an explosive-engine, particularly autoet tobosses into which the air casing or jacket scouring bolts arescrewed tosecure said casing or jacket, and Fig. 5 is an enlarged detail brokensectional elevation of a portion of the bottom and the top portions ofthe air casing or jacket and the annular jet-tube.

The enginebase or crank-casing 1. supports the cylinder 2 of: theengine, and the crank-shaft 3 of the engine is reduced and prolonged atone end to be connected directly to the blower-shaft 4. The blower-shaft4, being thus'driven directly the engineshaft, is subjected to thesametluctuations and variations in velocity as the former. This is amatter of importance in the workmobile-motors, which are necessarilyrequired to be run atspeeds varying materially in velocity, for when theengine is driven at a high velocity :1 corresponding il'icr ensc of thecapacity of the blower 4 is theresnlt, a matter of importance inconnection with this in vention, and is self-evident.

The cylinder 2 iS provided with a series of cooling-ribs 5, which ribsencircle the cylinder and are arranged at suitable intervals apart alongthe cylinder, and the same are provided for the purpose of dissipatingthe cat from the body of the cylinder The cooling-ribs 5 extend overthat portion of the cylinder the interior surface of which is exposed totheheat of the explosives used therein, and the same are preferablyturned or machined to remove the outer skin, due to molding, and exposethe clean metal to the cooling action of the air.

The casing or jacket 6 is cylindrical and completely encircles thecylinder 2, has its top and bottom ends open, and is of a lengthsufficient to permit its bottom flaring 0 on end to be situated slightlybelow the last cooling-rib 5 of said cylinder. The bottom open portion 7of the jacket 6 is fiaredbutwardly or bell-mouthed for the purposehereinafter set forth.

An annular tube 8 is provided at its upper I00 side with an annular jet-opening 9, which is preferably made continuous, so that when airescapes through said jetopening wilh, form a hollow cylindrical columnto encircle the entire cylinder 2. The tube 8 is terior top side towardthe annular jet top opening, which reduction is of a curved form prefer-5 ,ably inclined inwardly or reduced at Its eX- corresponding with thatof the curvature of the bell-mouth or flare 7 of the bottom open end ofthe casing 6, and the said tube 8 is situated relatively to the bottomopen end of said casing or jacket so that the flow of the column of airfrom the j et-opening of said,

lube will be best adapted to create a vacuum within the space betweenthe cylinder 2 and the casing 6, thereby promoting rapid and continuousflow of the exterior air between the reduced top portion of the annulartube 8 and the bell-mouthed open bottom portion 7 ol the jacket 6, andthis in'l'lowing air shall have imparted to it a velocity equal almostto the velocity of the air-jet escaping from the tube 8, by which theair is impelled. up- \Vitldl) in the space between said jacket and saidcylinder 2 toward the top deflecting end of siad acket. The air-jet tube8 is secured in position on said cylinder by securing-bolts 8*.

The dellecting end'of' the jacket is constructed with an inwardly anddownwardly inclined curved deflecting-lip 9, which is the best adaptedto impart a centrally-inclined downwind force to the upwardly-impelledair to cause the air to impinge against the upper surface of thecylinder-head 10 to cool the same.

The jacket 6 is secured to the main cylinder 2 by means of suitablebolts 11 and maintained in position relative thereto by nieans of thedistance-sleeves 12. (See particularly Figs. 1 and 35.)

It will be particularly noted that when the engine is required to bedriven at a high velocity the velocity ol the blower 4 will becorrespondingly high and the capacity of the blower will be greater andcause a greater volume of air to pass through the space between thecylinder 2 and its jacket 6 to carry ofi' the heat from said cylinder,and when said engine is required to be driven at a lesser velocitythespeed ol the blower will be c0rrespondingly reduced and the capacityof the blower will be proportionately reduced and less power will berequired to operate it, and the volume of air supplied to cool thecylinder will necessarily be less, and less will be required for thepurpose of cooling the cylinder, and thus the volume of air is regulateddirectly by the engine itself to suit the different conditions underwhich itis re uired to work. Certain parts around the cy ind er betweenthe ribs 5 are filled in to form a boss 13, which is drilled and tappedto receive the casingsecuring bolt 11. Similar bosses 14 are formed 011the head or top end of the cylinder and drilled and tapped for the samepurpose.

Having thus fully described this my invention, 'what I claim as new anduseful, and de sire to cover by Letters Patent of the United Statestherefor, is

In a gas or explosive engine, the combination with the cylinder thereofand a series of integral-turned air-cooling ribs surrounding saidcylinder, of a jacket or easing surrounding said cooling-ribs of saidcylinder and having its top and bottom ends open, said jacket having anoutwardly-flaring base-lip, an inwardly and downwardly curveddeflectingli situated at the top of said jacket or casing w iereby thecolumn of outgoing air is deflected against the end cover of thecylinder, an annular air-j et tube, having a continuous annular slit orair-outlet jet-opening, situated beneath the bottom open end of saidcasing in relative position thereto so that the air, un der pressureescaping from said annular slit is diretitly applied to cool the clinder, a pressure-blower connected direct y to the erank-shaft of saidengine and suitable means for connecting said blower to said annular jet-tu'be.

In testimony whereof I affix in presence of two witnesses.

SIMEON HAM.

my signature Witnesses:

THOMPSON R. BELL, FLORENCE GIMBEL.

